@premier69
Do you mean none of the mentioned operating systems are booting?
If so, then it may be that your motherboard does not support booting from NVMe disks.

In that case the only option would be to use another disk for booting (only), preferably a small SSD with Sata3 interface. A USB stick could also be used as a boot device, but that may be a bit slow… but if that is not a problem for you, why not try that.

But I’m not an expert on NMVe since I have no such disks, someone else may know more.

I’m pretty sure you can make the machine boot (by using another drive as the boot drive) and store everything else to the M.2 SSD (so that the machine runs fast).

In BIOS, you can select either UEFI (EFI) boot mode, or Legacy boot mode (not sure if they are named there exactly like that). UEFI is a newer specification, thus it is recommended over Legacy boot (but you can test which one works better).

Do you plan to install only Antergos, or also other operating systems?

This already might make your system bootable (to Antergos).
Note however that his is more like a test for workaround idea, but if this works for you, there is no reason why not start using it permanently.